/Engine/Plugins/AudioGameplayVolume/Source/AudioGameplayVolume/Public/AudioGameplayVolumeMutator.h
Create and fill the appropriate proxy mutator for this component
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FProxyVolumeMutator](API\Plugins\AudioGameplayVolume\FProxyVolumeMutator) > CreateMutator() const